intro story D-Flow FM


D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 


We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.





Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems


Message Boards

Threads with tag deft3d-wave .

Thread Started By Replies Views Last Post  
Wave height limited for coastal WAVE model Akash Vijay Kumar 1 41
WAVE - How to input time varying but spatially constant wind Akash Vijay Kumar 0 34
Wave spectra from uniform wind field Chelsea Volpano 0 102
Obtaining water levels/elevation in QUICKPLOT Audrey Bourne 4 815
file 'norm_end' expected to signal a correct swan calculation George Victor 0 967
Validating WAVE model outputs to buoy Charlotte Lyddon 0 361
Compilation - VS won't copy wave.exe Lucas De Oliveira Toledo Morais 0 442
Delft3D-Wave space varying boundary conditions in spherical coordinates Francesco Enrile 2 1944
*** ERROR: Unable to open file SWANOUT2 A D 2 2152
VERY slow computation! Erin King 0 747
online delft3d flow and swan coupling hoda el safty 7 6389
Delft3D-WAVE invalid gridfile error William Bennett 1 1217
Delft3D-SWAN error - Segementation Fault (core dumped) Nate VanArendonk 2 4716
erorr wave on delft3D Dam Giang 0 397
Delft3d WAVE grid cell centers vs corners Hannah Snow 0 2997
Flow model error when include sediment Yuwana Sriraharjo 1 1063
FLOW-WAVE coupling problem Hafizur Rahman 1 1498
D3D-WAVE: Quirks when using SpectrumSpec = from file Ruairi MacIver 1 3582